TCP IP Illustrated

Default is 300000 ms 5 minutes ip maintains its own

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Unformatted text preview: 1 (default), the host generates ICMP source quench errors when incoming datagrams are discarded. If 0, these are not generated. ip_wroff_extra (Debug) Number of bytes of extra space to allocate in buffers for IP headers. Default is 32. /dev/icmp icmp_bsd_compat (Debug) If 1 (default), the length field in the IP header of received datagrams is adjusted to exclude the length of the IP header. This is compatible with Berkeley-derived implementations and is for applications reading raw IP or raw ICMP packets. If 0, the length field is not changed. icmp_def_ttl The default TTL for outgoing ICMP messages. Default is 255. icmp_wroff_extra (Debug) Number of bytes of extra space to allocate in buffers for IP options and data-link headers. Default is 32. /dev/arp arp_cache_report (Readonly) The ARP cache. arp_cleanup_interval The interval after which ARP entries are discarded from ARP's cache. Default is 300000 ms (5 minutes). (IP maintains its own cache of completed ARP translations; see ip_ire flush_interval.) file:///D|/Documents%20and%20Settings/bigini/Docu...homenet2run/tcpip/tcp-ip-illustrated/append_e.htm (9 of 16) [12/09/2001 14.48.06] Appendix E: Configurable Options arp_debug (Debug) If 1, enables printing of debug output by the ARP driver. Default is 0. /dev/udp udp_def_ttl The default TTL for outgoing UDP datagrams. Default value is 255. udp_do_checksum If 1 (default), UDP checksums are calculated for outgoing UDP datagrams. If 0, outgoing UDP datagrams do not contain a checksum. (Unlike most other implementations, this UDP checksum flag does not affect incoming datagrams. If a received datagram has a nonzero checksum, it is always verified.) udp_largest_anon_port Largest port number to allocate for UDP ephemeral ports. Default is 65535. udp_smallest_anon_port Starting port number to allocate for UDP ephemeral ports. Default is 32768. udp_smallest_nonpriv_port A process requires superuser privilege to assign itself a port number less than this. Default is 1024. udp_status (Read only) The status of all local UDP end po...
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